Home > Developer > JavaScript

Local Image Preview (IE6/IE7/IE8/Firefox3 supported) Experience Summary

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

The requirements for local image preview recently encountered in the Web project development process, although not available for other reasons at last, it is also a bit of understanding, sorted out.

Here we divide by browser, mainly including IE6, IE7/8, and Firefox3, excluding Opera, Safari, and Chrome. These three are basically very small and have not been studied.

To sum up:
In IE6, you can directly obtain the image path from the file value to display the preview.
In IE7 and IE8, you can use select to obtain the file image path, and then use a filter to display the preview.
In FireFox, The getAsDataURL method of file is called to obtain Data URI Data to display the preview.

The following is a complete Demo:
Copy codeThe Code is as follows:
<Html>
<Head>
<Script src = "http://deepliquid.com/projects/Jcrop/js/jquery.min.js"> </script>
</Head>
<Body>
<Input type = "file" id = "picture" name = "picture" size = "35" value = "" onchange = "setImg (this)"/>
<Div id = "preview_fake" style = "margin-left: 50px">
</Div>

<Style type = "text/css">
# Preview_fake {
/* This object is used to display preview images under IE
*/
Filter: progid: DXImageTransform. Microsoft. AlphaImageLoader (sizingMethod = scale );
}
# Preview_size_fake {
/* This object is only used to obtain the original size of the image under IE, and has no other purpose
*/
Filter: progid: DXImageTransform. Microsoft. AlphaImageLoader (sizingMethod = image );
Visibility: hidden;
}
</Style>
<Script type = "text/javascript">
Function setImg (obj ){
If (! Obj. value. match (/. jpg |. gif |. png |. bmp/I )){
Alert ('image format is invalid! ');
Return false;
}
$ ("# Preview_fake"). empty ();
Var img = document. createElement ("img ");
Img. setAttribute ("src ","");
Img. setAttribute ("id", "preview ");
Document. getElementById ("preview_fake"). appendChild (img );
If ($. browser. msie ){
If ($. browser. version = 6.0 ){
$ ("# Preview"). attr ("src", obj. value );
} Else {
Var objPreview = document. getElementById ('preview ');
Var objPreviewFake = document. getElementById ('preview _ fak ');
Var objPreviewSizeFake = document. getElementById ('preview _ size_fake ');
Obj. select ();
Var imgSrc = document. selection. createRange (). text;
ObjPreviewFake. filters. item ('dximagetransform. Microsoft. AlphaImageLoader '). src = imgSrc;
ObjPreviewSizeFake. filters. item ('dximagetransform. Microsoft. AlphaImageLoader '). src = imgSrc;
AutoSizePreview (objPreviewFake, objPreviewSizeFake. offsetWidth, objPreviewSizeFake. offsetHeight );
ObjPreview. style. display = 'none ';
}
}
If ($. browser. mozilla ){
$ ("# Preview"). attr ("src", obj. files [0]. getAsDataURL ());
}
If ($. browser. opera ){
Alert ("operabrowser not supported currently ");
}
If ($. browser. safari ){
Alert ("Safari is not supported currently ");
}
}
</Script>
</Body>
</Html>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
tensorflow image summary multiple image upload with preview in php microsoft preview wolfenstein preview dreamweaver preview tombstone summary redeployment summary
Related Article
JavaScript solution to the eight Queens Problem method summar...
The difference between single and double quotes in JavaScript...
Http status code: 301, 302 redirection, 302 redirection
The html space symbol nbsp; ensp; emsp; introduces and implem...
Ajax and 302 response code Testing
Ajax and 302 response code test_javascript-js tutorial

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More